The short answer Plan on 3 to 7 working days for a prototype, 7 to 10 days for a small batch and 14 to 30 business days for production, measured from an approved drawing. Add 2 to 4 days for a specialty alloy and 2 to 5 days if the part needs finishing, then 2 to 7 days by air. A lead time is a queue, not a machining speed Buyers usually compare lead times as if they measured how fast a suppli...

The short answer Aluminium 6061 and 7075, stainless 303, 304 and 316, carbon and alloy steel, titanium Ti-6Al-4V, brass C360 and copper C110 cover most metal work; POM, nylon, PEEK and ABS cover most plastic work. Material and machinability together drive 35 to 60 percent of part cost. Machinability, not price per kilo, drives the part cost Two materials can cost the same per kilogram and prod...

The short answer Treat an OEM award as a gated programme, not a search. Sign the NDA, place a paid sample order of 5 to 20 pieces, clear first article inspection and a written quality agreement, then run a pilot lot at 10 to 30 percent of annual volume. Budget 4 to 8 weeks from first contact to a qualified supplier. An OEM award is a programme, not a search The question most buyers ask is whic...

The short answer Precision CNC machining is defined by three measurable things: tolerances of 0.025 mm or tighter against 0.1 to 0.2 mm for general work, surface finish down to Ra 0.4 micrometres, and repeatability proven by Cpk 1.33 or above. It cuts without tooling and suits almost any metal. Precision is three measurable numbers, not one "Precision machining" is a phrase that suppliers use ...

The short answer Die casting's main environmental load is melting metal, not the casting cycle: primary aluminium carries roughly 16 kg CO2e per kilogram, and secondary aluminium needs up to 95 percent less energy than primary smelting. Over 95 percent of process scrap is remelted in house, but VOC release agents and magnesium cover gases are the pieces that need active control. Where the load...

The short answer Seven grades cover nearly all zinc die casting. Zamak 3 is the workhorse at 283 MPa, Zamak 5 adds copper for 331 MPa, Zamak 2 is the strongest Zamak at 359 MPa and Zamak 7 is the most ductile at 13 percent elongation. ZA-8, ZA-12 and ZA-27 raise aluminium content to 8, 12 and 27 percent for 372, 404 and 426 MPa. The seven grades at a glance Zinc die casting looks like a smalle...

The short answer Zinc alloys run in hot-chamber machines at 380 to 390 C, so they cycle in 5 to 20 seconds, fill walls down to 0.4 mm and hold tolerances around plus or minus 0.05 mm. Dies last 500,000 to a million shots. The trade is weight at 6.6 g/cm3 and a service ceiling near 100 C. Seven advantages, ranked by what they save Zinc is often overlooked because aluminium is the default choice...

The short answer Aluminum die casting wins on volume economics: 15 to 60 second cycles, H13 dies that last 100,000 to 500,000 shots, and near-net shapes that cut material waste by 60 to 80 percent against machining. Those three together make it the lowest total-cost route above about 5,000 parts a year, and the only one that also casts features instead of assembling them. Speed is the first be...

The short answer Aluminum die casting is dominated by four or five Al-Si alloys. A380 and its equivalents ADC12 and ADC10 cover general housings and brackets, A383 fills large thin walls, A360 handles corrosion and pressure tightness, A413 suits leak-critical manifolds and B390 is reserved for wear surfaces. Silicon controls fluidity; copper controls strength and corrosion. Die casting alloys ...

The short answer Aluminium alloys account for over 70 percent of die-cast parts because they combine a strength-to-weight ratio of 200 to 330 MPa at 2.7 g/cm3 with fast 20 to 90 second cycles, thermal conductivity of 92 to 170 W/m.K, as-cast tolerances of plus or minus 0.1 to 0.25 mm and complete recyclability. No competing casting metal delivers all five at the same cost. Six reasons aluminiu...

The short answer Four alloy families cover almost all die casting: aluminium, typically ADC12 or A380 and over 70 percent of all die-cast parts; zinc, usually Zamak 3 or Zamak 5 for thin-wall precision parts; magnesium, mainly AZ91D where weight matters; and copper alloys such as C36000 where conduction and wear resistance matter. Selection balances density, strength, casting temperature and cos...

The short answer Yes, and for packaging and automotive work it is increasingly compulsory. In-house regrind can be fed back at high ratios with little loss; post-consumer recyclate is normally blended at 10 to 35 percent and needs tighter inspection, because molecular weight, colour and odour vary by batch and impact strength can drop by a quarter or more. PIR and PCR are not the same thing Th...

The short answer Water in the pellet turns to steam at melt temperature and breaks the polymer chains, so wet resin produces silver streaks, bubbles, a dull surface and measurably weaker parts. Hygroscopic resins - PA, PC, PBT, PET and to a lesser degree ABS - must be dried to a stated limit, typically 0.01 to 0.10 percent, before moulding. Hygroscopic versus non-hygroscopic resins The dividin...

The short answer Yes, with limits. Bio-based drop-in grades such as bio-PE, bio-PET and bio-PA run on standard injection molding equipment with the same settings as their fossil twins. PLA, PHA, PBS and starch blends mould too, but they need their own mould temperatures, drying and cycle settings, and PLA softens near 60 C, so hot-fill and under-hood use are out. Bio-based and biodegradable ar...

The short answer Choose from the part's duty, not from a price list. Fix the operating temperature range first, then chemical, UV and moisture exposure, then load, impact and creep, then appearance and regulation, and only then cost. The resin family falls out of that sequence; it should never be the starting point. Filter on duty before you open a datasheet Most material mistakes are made in ...

The short answer ABS is popular because one resin delivers impact toughness, a glossy moulded surface and easy processing at a mid-range price. It runs at 210 to 250 C with a wide process window, holds 0.4 to 0.7 percent shrinkage, and accepts paint, plating, gluing and ultrasonic welding better than most plastics. Its limits are UV, heat near 90 C, solvents and flammability. Three monomers, t...

The short answer Injection molding runs three tiers of plastic. Commodity grades - PP, PE, PS and ABS - cover most packaging, housings and consumer parts at USD 1.20 to 2.60 per kilogram. Engineering resins - PC, PA, POM and PBT - add strength, heat resistance and dimensional stability. High-performance grades such as PPS, PEEK and PPSU serve under-hood, aerospace and medical duty. Three tiers...

The short answer Start with one controlled file set: a STEP model plus a dimensioned PDF, and state the material grade, quantity, finish and the date that matters. A DFM review comes back in 24 to 48 hours and standard geometry quotes within hours. Prototypes typically run 7 to 14 business days, low volume 2 to 3 weeks, and new hard tooling 4 to 8 weeks. The route from RFQ to packed parts A fa...

The short answer Laser cutting makes the cut with a focused beam instead of a blade, so it cuts contours, not just straight lines, holds plus or minus 0.1 mm on a kerf of 0.1 to 0.25 mm, and needs no secondary finishing. Traditional methods are cheaper per metre: shearing cuts a straight edge fastest, plasma handles heavy plate, and waterjet cuts any thickness without heat. What actually diffe...

The short answer The choice follows environment first, then load. Cold-rolled steel is the default when the part will be painted. Galvanised steel replaces it outdoors for roughly 10 to 20 percent more. Stainless 304 costs about four times cold-rolled steel and needs no coating; 316 about five times. Aluminium 5052 is a third of the weight of steel at around three times the price per kilogram. ...

The short answer Sheet metal fabrication runs from roughly 0.3 mm to 25 mm, and most production parts sit between 0.5 mm and 6 mm. The ceiling belongs to the process, not the shop: shearing and punching stop near 6 mm, press brake bending at about 12 mm, fiber laser cutting reaches 25 mm in mild steel, and plasma or waterjet take over above that. Cut edges normally hold plus or minus 0.1 mm. W...

The short answer Stamping - also called pressing - forms parts from sheet metal or coil by driving a shaped tool, the die, into the material. It covers blanking, piercing, bending, drawing, forming and coining, and it runs on mechanical or servo presses. Because the geometry comes from the tool rather than from the machine's motion, stamped parts repeat very closely: ±0.025 mm is routine on prog...

The short answer Metal sheet fabrication is the group of processes that turn flat sheet or coil into finished parts without machining material away. Cutting produces the blank, forming creates the three-dimensional geometry, joining holds the pieces together, and finishing protects the surface. Fibre laser cutting handles roughly 0.5 to 25 mm mild steel, most production parts run between 0.5 and...

The short answer The workhorses of sheet metal fabrication are cold-rolled low-carbon steel (SPCC, DC01), galvanised steel (SECC, SGCC), austenitic stainless 304 and 316, aluminium 5052 and 6061-T6, and copper C1100 with brass C260. The split is simple: steel covers strength at the lowest cost, stainless covers corrosion, aluminium covers weight, and copper or brass cover conductivity and appear...

The short answer Yes: nylon is the leading engineering polymer for functional 3D printed parts. PA12 on SLS or MJF gives about 48 MPa tensile and heat deflection near 170 C with near-isotropic strength; PA6 on FDM reaches 70 MPa; carbon-filled grades reach 110 MPa. Its limits are moisture, ultraviolet light, cost and the anisotropy of filament printing. Which nylon, for which process Nylon is ...

The short answer 3D printing material reaches you through four channels: retail spools and resin bottles, industrial distributors, factory-direct orders and the qualified stock held by a manufacturing partner. The right channel depends on the feed form your process needs, the documentation your industry requires and the volume you buy. Filament is sold on 1 kg spools from about USD 15, powder in...

The short answer Yes, but the risk is not the spool label, it is the polymer temperature and chemistry. Every FDM print releases ultrafine particles and some volatile organic compounds: ABS and ASA add styrene, nylon adds caprolactam, polycarbonate adds bisphenol-class compounds, and uncured resin is a skin sensitiser. Match ventilation and handling to the material and most concerns disappear. ...

The short answer Start from the failure you cannot accept, then answer four questions in order: service temperature, load and its direction, detail and finish, and finally quantity and cost. FDM is cheapest for directional loads, SLS and MJF nylon give isotropic strength, SLA gives the finest detail, and SLM metal works above 300 °C. The process usually decides the material. Start from the fai...

The short answer Yes, in three ways: multi-material printing with a second extruder or a material unit, soluble or breakaway support pairs, and rigid-plus-flexible combinations. The limit is the interface, not the printer. Paired materials must share a nozzle and bed temperature window, so PLA with PVA, PETG with BVOH and ABS with HIPS work, while PLA with ABS does not bond reliably. Three dif...

The short answer Avoid PLA above roughly 45 to 50 °C in service, under sustained load, outdoors in direct sunlight, where repeated impact is expected, or in contact with solvents. An unprotected PLA part can last over 10 years indoors and still crack within 3 to 6 months in sun and rain. PETG covers toughness, ASA covers outdoor, ABS and polycarbonate cover heat, SLS PA12 covers load. Six cond...

The short answer ABS is the tougher and far more heat resistant material: heat deflection of 95 to 100 °C against 50 to 57 °C for PLA, and 15 to 25 kJ/m2 notched impact against 3 to 5. PLA is stiffer, cheaper and prints without an enclosure. ABS needs a 95 to 110 °C bed, an enclosure and ventilation, and it warps on large parts. Head to head: the numbers that decide it Most ABS versus PLA argu...

The short answer PLA, or polylactic acid, is a bio-based thermoplastic printed at 190 to 220 °C. Its advantages are cost at about USD 18 to 28 per kilogram, printing with no enclosure, minimal warping, sharp detail and the widest colour range in FDM. Its limit is heat: standard PLA softens near 55 to 60 °C and creeps under sustained load. What PLA is, and why it prints so easily PLA is a polye...

The short answer PLA, PETG, ABS or ASA, TPU and Nylon PA12 cover most printed parts. PLA is cheapest and easiest but softens near 50 to 60 degrees Celsius. PETG is the functional default at 70 to 80 degrees. ABS and ASA reach 80 to 105 degrees, with ASA for outdoor use. TPU bends and seals; Nylon PA12 carries load and heat. The six materials that cover most parts Everything else is a variation...

The short answer Choose a sheet metal fabricator on process fit, not price. Confirm the material, thickness and tolerance your part needs, ask for a line-item quote and an engineering reply, audit inspection and capacity, then approve a sample and a small pilot before volume. A weak reply to a technical question is the strongest warning sign. Four gates before volume Supplier selection is a se...

The short answer Powder coating is the default for steel and mixed metal, giving 60 to 120 micrometres of colour and impact protection. Type II anodising suits aluminium where a metallic look and wear resistance matter, hard anodising where sliding wear dominates, and passivation is a low-cost step for stainless. Finishing can reach 25 to 40 percent of part cost. Five finishes cover most sheet...

The short answer Common sheet metal grades are cold-rolled SPCC or Q235 carbon steel, SGCC galvanised steel, 304 and 316 stainless, 5052-H32 and 6061-T6 aluminium, and copper or brass. Thickness runs about 0.5 to 6 mm, and grade choice is driven by corrosion, formability, weight and weldability rather than price alone. Specify the decimal thickness, not the gauge The single most common specifi...

The short answer Injection molding is a repeating process that melts thermoplastic pellets in a heated barrel, injects the melt into a closed steel mould under 60 to 150 MPa, holds it under pressure while it shrinks, then cools and ejects the finished part. One cycle takes 15 to 120 seconds, cooling is 50 to 80 percent of that time, and the cycle then repeats automatically. A machine is three ...

The short answer Injection molding fills a machined steel cavity with molten resin under 60 to 150 MPa, so it holds plus or minus 0.025 to 0.05 mm, delivers Class A surfaces and keeps 95 to 100 percent of the resin's rated strength. 3D printing builds the part layer by layer with no tooling, holding plus or minus 0.1 to 0.5 mm and retaining 60 to 85 percent of rated strength. The physical diff...

The short answer The main advantage is unit cost at volume. Injection molding needs a mold costing USD 2,000 to 40,000 and takes 2 to 8 weeks to build, but then a part costs USD 0.10 to 2.00 and leaves the machine every 15 to 60 seconds. Additive manufacturing has no tooling but a part price of USD 1 to 40. One number carries the whole argument Every other difference between the two processes ...

The short answer A single-stage die performs one operation per press stroke - blank, pierce, or form - and the part has to be moved to another die for every additional feature. A progressive die puts 4 to 30 stations into one die set: strip feeds continuously, each station adds one or more features, and a finished part is sheared off at the last station on every stroke, up to 1,500 strokes per m...